Polyform
Polyform is a Shopify theme by SmartBase® ($320). Tested on 2026-09-13 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 80 for mobile speed and 96 for desktop speed, 99/99 for SEO and 94/92 for accessibility (mobile/desktop, 0–100). Those are medians across its 2 tested presets; mobile speed across every tested page ranges from 73 to 86. On its marketplace it is rated 5.0 out of 5 from 4 reviews.
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 80 | 96 |
| SEO | 99 | 99 |
| Accessibility | 94 | 92 |
| Best practices | 95 | 96 |
Median of 2 presets · measured 12 times since 2026-09-11 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Mellow home page
Mobile
Speed 73 · 27 points to gain
- −23.3 Largest Contentful Paint medium effort
- −2.1 First Contentful Paint medium effort
- −1.1 Speed Index medium effort
- −0.6 Total Blocking Time medium effort
- 210 ms Reduce unused CSS high effort
Accessibility 96 · 4 points to gain
- −4.3 Buttons do not have an accessible name medium effort
Best practices 96 · 4 points to gain
- −3.8 Browser errors were logged to the console medium effort
Desktop
Speed 91 · 9 points to gain
- −4.5 Largest Contentful Paint medium effort
- −4.2 Speed Index medium effort
Accessibility 90 · 10 points to gain
- −4.3 Buttons do not have an accessible name medium effort
- −3 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −3 Touch targets do not have sufficient size or spacing. medium effort
Best practices 92 · 8 points to gain
- −3.8 Browser errors were logged to the console medium effort
- −3.8 Issues were logged in the `Issues` panel in Chrome Devtools high effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Polyform demo ↗ | 81 | 97 | 94 | 97 | 97 | 93 | 2026-09-12 |
| category ↗ | 86 | 100 | 92 | 98 | 100 | 89 | 2026-09-12 |
| home ↗ | 73 | 92 | 97 | 96 | 92 | 97 | 2026-09-12 |
| product ↗ | 85 | 100 | 93 | 98 | 100 | 92 | 2026-09-12 |
| Mellow default demo ↗ | 79 | 100 | 94 | 95 | 100 | 90 | 2026-09-11 |
| category ↗ | 82 | 100 | 92 | 97 | 100 | 89 | 2026-09-12 |
| home ↗ | 73 | 100 | 96 | 91 | 100 | 90 | 2026-09-11 |
| product ↗ | 83 | 100 | 93 | 97 | 100 | 92 | 2026-09-12 |
Show this score on your site
A live badge: it always shows Polyform's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/shopify/polyform"><img src="https://themestested.com/badge/shopify/polyform.svg" alt="Polyform speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.